2:3 Pulldown:A method of converting 24fps film to video by repeating one film frame as three video fields, then repeating the next film frame as two video fields.

3D:Three-dimensional, or having appearance the appearance of three dimensional depth. 3D images can refer to stereoscopic images (one image for each eye) or computer-generated images based on three-dimensional modeling.
More info: 3-D

3GP:A video format based on MPEG-4, used for mobile devices such as cellphones.More info: MPEG-4

4:1:1:A video compression ratio in which the chroma (colour) is sampled at one quarter the rate of luminance (brightness).More info: 4:1:1

4:2:2:A video compression ratio in which the chroma is sampled at one half the rate of luminance.More info: 4:2:2

4:4:4:A video compression ratio in which the chroma is sampled at the same rate as luminance.More info: 4:4:4